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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2017 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@php.net> |
| Zeev Suraski <zeev@zend.com> |
| Pedro Melo <melo@ip.pt> |
| Sterling Hughes <sterling@php.net> |
| |
| Based on code from: Shawn Cokus <Cokus@math.washington.edu> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifndef PHP_RAND_H
#define PHP_RAND_H
#include <stdlib.h>
#include "basic_functions.h"
#include "php_lcg.h"
/* System Rand functions */
#ifndef RAND_MAX
#define RAND_MAX (1<<15)
#endif
/* In ZTS mode we rely on rand_r() so we must use RAND_MAX. */
#if !defined(ZTS) && (defined(HAVE_LRAND48) || defined(HAVE_RANDOM))
#define PHP_RAND_MAX 2147483647
#else
#define PHP_RAND_MAX RAND_MAX
#endif
#define RAND_RANGE(__n, __min, __max, __tmax) \
(__n) = (__min) + (zend_long) ((double) ( (double) (__max) - (__min) + 1.0) * ((__n) / ((__tmax) + 1.0)))
/* MT Rand */
#define PHP_MT_RAND_MAX ((zend_long) (0x7FFFFFFF)) /* (1<<31) - 1 */
#ifdef PHP_WIN32
#define GENERATE_SEED() (((zend_long) (time(0) * GetCurrentProcessId())) ^ ((zend_long) (1000000.0 * php_combined_lcg())))
#else
#define GENERATE_SEED() (((zend_long) (time(0) * getpid())) ^ ((zend_long) (1000000.0 * php_combined_lcg())))
#endif
PHPAPI void php_srand(zend_long seed);
PHPAPI zend_long php_rand(void);
PHPAPI void php_mt_srand(php_uint32 seed);
PHPAPI php_uint32 php_mt_rand(void);
#endif /* PHP_RAND_H */